BlackBerry Motion Won't Turn On

I've had this motion for maybe 2 years now but it was only used for 1. It's always worked okay, went to use it after maybe 8 months of turning it on and it's being strange.

When I tried to turn it on it flashed the BB logo for a split second and now it won't give a red light when plugged in, won't turn on with me holding the power button, long pressing it, using the power button + volume down, volume up+down+power for 20+ seconds also doesn't work. I thought this was maybe due to it being on a shelf for so long. Is there anything I can do to get it working again? I'm out of ideas.

Replace battery?

Try different charger & cables - some of the old PlayBook Stack Charging tricks - replace battery.

It doesn't charge with any cable and can confirm the cables work. I don't think it's the battery since it won't even turn on when plugged in.

I thought the stack charging trick was basically use the magnetic charger and normal charger? With a motion I have only the one option.

Is there any other way to attempt to jump-start this thing? The screen flashed for a second and it was barely even used. Just sat on a shelf for most of a year.